The price fell precipitously over just a few years, too. By 1978 it was going for about $8 ($31 today) for large quantities, and by 1981 you could purchase the

The price fell precipitously over just a few years, too. By 1978 it was going for about $8 ($31 today) for large quantities, and by 1981 you could purchase them for $4 ($15 today) individually and well under $3 in bulk.